sound/soc/mediatek/mt2701/mt2701-wm8960.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * mt2701-wm8960.c  --  MT2701 WM8960 ALSA SoC machine driver
   4  *
   5  * Copyright (c) 2017 MediaTek Inc.
   6  * Author: Ryder Lee <ryder.lee@mediatek.com>
   7  */
   8
   9 #include <linux/module.h>
  10 #include <sound/soc.h>
  11
  12 #include "mt2701-afe-common.h"
  13
  14 static const struct snd_soc_dapm_widget mt2701_wm8960_widgets[] = {
  15         SND_SOC_DAPM_HP("Headphone", NULL),
  16         SND_SOC_DAPM_MIC("AMIC", NULL),
  17 };
  18
  19 static const struct snd_kcontrol_new mt2701_wm8960_controls[] = {
  20         SOC_DAPM_PIN_SWITCH("Headphone"),
  21         SOC_DAPM_PIN_SWITCH("AMIC"),
  22 };
  23
  24 static int mt2701_wm8960_be_ops_hw_params(struct snd_pcm_substream *substream,
  25                                           struct snd_pcm_hw_params *params)
  26 {
  27         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  28         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  29         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  30         unsigned int mclk_rate;
  31         unsigned int rate = params_rate(params);
  32         unsigned int div_mclk_over_bck = rate > 192000 ? 2 : 4;
  33         unsigned int div_bck_over_lrck = 64;
  34
  35         mclk_rate = rate * div_bck_over_lrck * div_mclk_over_bck;
  36
  37         snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, SND_SOC_CLOCK_OUT);
  38         snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, SND_SOC_CLOCK_IN);
  39
  40         return 0;
  41 }
  42
  43 static struct snd_soc_ops mt2701_wm8960_be_ops = {
  44         .hw_params = mt2701_wm8960_be_ops_hw_params
  45 };
  46
  47 static struct snd_soc_dai_link mt2701_wm8960_dai_links[] = {
  48         /* FE */
  49         {
  50                 .name = "wm8960-playback",
  51                 .stream_name = "wm8960-playback",
  52                 .cpu_dai_name = "PCMO0",
  53                 .codec_name = "snd-soc-dummy",
  54                 .codec_dai_name = "snd-soc-dummy-dai",
  55                 .trigger = {SND_SOC_DPCM_TRIGGER_POST,
  56                             SND_SOC_DPCM_TRIGGER_POST},
  57                 .dynamic = 1,
  58                 .dpcm_playback = 1,
  59         },
  60         {
  61                 .name = "wm8960-capture",
  62                 .stream_name = "wm8960-capture",
  63                 .cpu_dai_name = "PCM0",
  64                 .codec_name = "snd-soc-dummy",
  65                 .codec_dai_name = "snd-soc-dummy-dai",
  66                 .trigger = {SND_SOC_DPCM_TRIGGER_POST,
  67                             SND_SOC_DPCM_TRIGGER_POST},
  68                 .dynamic = 1,
  69                 .dpcm_capture = 1,
  70         },
  71         /* BE */
  72         {
  73                 .name = "wm8960-codec",
  74                 .cpu_dai_name = "I2S0",
  75                 .no_pcm = 1,
  76                 .codec_dai_name = "wm8960-hifi",
  77                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
  78                         | SND_SOC_DAIFMT_GATED,
  79                 .ops = &mt2701_wm8960_be_ops,
  80                 .dpcm_playback = 1,
  81                 .dpcm_capture = 1,
  82         },
  83 };
  84
  85 static struct snd_soc_card mt2701_wm8960_card = {
  86         .name = "mt2701-wm8960",
  87         .owner = THIS_MODULE,
  88         .dai_link = mt2701_wm8960_dai_links,
  89         .num_links = ARRAY_SIZE(mt2701_wm8960_dai_links),
  90         .controls = mt2701_wm8960_controls,
  91         .num_controls = ARRAY_SIZE(mt2701_wm8960_controls),
  92         .dapm_widgets = mt2701_wm8960_widgets,
  93         .num_dapm_widgets = ARRAY_SIZE(mt2701_wm8960_widgets),
  94 };
  95
  96 static int mt2701_wm8960_machine_probe(struct platform_device *pdev)
  97 {
  98         struct snd_soc_card *card = &mt2701_wm8960_card;
  99         struct device_node *platform_node, *codec_node;
 100         int ret, i;
 101
 102         platform_node = of_parse_phandle(pdev->dev.of_node,
 103                                          "mediatek,platform", 0);
 104         if (!platform_node) {
 105                 dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
 106                 return -EINVAL;
 107         }
 108         for (i = 0; i < card->num_links; i++) {
 109                 if (mt2701_wm8960_dai_links[i].platform_name)
 110                         continue;
 111                 mt2701_wm8960_dai_links[i].platform_of_node = platform_node;
 112         }
 113
 114         card->dev = &pdev->dev;
 115
 116         codec_node = of_parse_phandle(pdev->dev.of_node,
 117                                       "mediatek,audio-codec", 0);
 118         if (!codec_node) {
 119                 dev_err(&pdev->dev,
 120                         "Property 'audio-codec' missing or invalid\n");
 121                 ret = -EINVAL;
 122                 goto put_platform_node;
 123         }
 124         for (i = 0; i < card->num_links; i++) {
 125                 if (mt2701_wm8960_dai_links[i].codec_name)
 126                         continue;
 127                 mt2701_wm8960_dai_links[i].codec_of_node = codec_node;
 128         }
 129
 130         ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
 131         if (ret) {
 132                 dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
 133                 goto put_codec_node;
 134         }
 135
 136         ret = devm_snd_soc_register_card(&pdev->dev, card);
 137         if (ret)
 138                 dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
 139                         __func__, ret);
 140
 141 put_codec_node:
 142         of_node_put(codec_node);
 143 put_platform_node:
 144         of_node_put(platform_node);
 145         return ret;
 146 }
 147
 148 #ifdef CONFIG_OF
 149 static const struct of_device_id mt2701_wm8960_machine_dt_match[] = {
 150         {.compatible = "mediatek,mt2701-wm8960-machine",},
 151         {}
 152 };
 153 #endif
 154
 155 static struct platform_driver mt2701_wm8960_machine = {
 156         .driver = {
 157                 .name = "mt2701-wm8960",
 158                 .owner = THIS_MODULE,
 159 #ifdef CONFIG_OF
 160                 .of_match_table = mt2701_wm8960_machine_dt_match,
 161 #endif
 162         },
 163         .probe = mt2701_wm8960_machine_probe,
 164 };
 165
 166 module_platform_driver(mt2701_wm8960_machine);
 167
 168 /* Module information */
 169 MODULE_DESCRIPTION("MT2701 WM8960 ALSA SoC machine driver");
 170 MODULE_AUTHOR("Ryder Lee <ryder.lee@mediatek.com>");
 171 MODULE_LICENSE("GPL v2");
 172 MODULE_ALIAS("mt2701 wm8960 soc card");
 173